Lock for adjustable back-frames of account-books, ledgers, &amp;c.



No. 793,790. PATENTEB JULY li, 1905. L D. HULQUST. LOCK )EUR ADJUSTABLEBACK FRAMES 0F AGGGUNT BOOKS, LEDG-ERS, &o

APPLOATION FILED MAE. 1G, 1903.

E BHEETS-SHEBT l.

No. 798,790. PATENTED JULY Ll, 1905.

A. D HULQUIST. LOCK FOR ADJUSTABLE BACK FRAMES 0F ACCOUNT BUKS,IQIEDGfERS im APPLICATION FILED MAR. 16, 1003,

A A """""w i No. 793,790. PATENTED JULY A. 1905. AI D. HULQUIST.

LOOK FOR ADJUSTABLE BACK FRAMES OF ACCOUNT BOOKS, LEDGERS, Aw.APPLIUATION FILED MAR.1B,1903.

a SHEETS-SHEET s.

Las. 793,790.

Patented July 4t, 1905.

LOCK FOR ADJUSTABLE BACl -FRAMES OF ACCOUNT-BOOKS, I lDGlRS, ttc.

SPECIFCACtON forming part of Letters Patent "No, 793,790, dated J uly 4,1905.

application tiled March 16, l903 Serial No. 148,003.

To rtf] Vwhom, it mfr/.yq coll/cern:

lio it known that l, A Nlnzfmv D. llnLoUIs'r, a citizen of the Unitedt'tates, and a resident of tUhicago, in the 4(.:ounty of @ook and tltateof lllinois, have invented certain new and uscful lrnprovemei'its inLocks for Adjustable liack-li`rames of Accouut-l'ooks, Ledgers, zc., ofwhich the following is a full, clear, and exact description.

lhc object of my invention is to provide a simple, cheap, and effectivegravity-controlled lock Vfor locking the telescopic back-sections ofImoks, and particularly heavy books, such as account-books,invoice-books, ledgers, &c., together in such manner that said backs maybe expanded for the insertion or removal of matter for the accommodationof which such books are intended and then easily and quickly locked, soas to clamp and secure such matter in book form between them. rlhis Vlaccomplish largely by constructing the parts thereol' of commercialforms of materials in the manner herciliafter `fully described and asparticularly pointed out in the claims` ln the d rawings, VFigure 1 is aperspective view of a book having my inmrovements applied thereto. Fig.2 is a cross-section through the hack and a portion of the coversthereof, drawvn to a larger scale and showing' the relative position ofthe parts of the lock when locked together. Fig. 3 is a similar viewshowing the relative `position of the same when unlocked. Fig. t is aplan view of a portion of one of the [nick-clamping plates and end ofone of said locks secured therein. Fig. 5 is a section taken on dottedline 5 5, Fig. 3, looking in the direction indicated by the arrows.liig. (i is a longitiulinal central section of a modified constructionof said ii'nproved lock. `liiig. 7 is a detail view showing a sideelevation of the bolt used in connection with the preferred form of myinvention. Fig. 8 is a detail view showing a side elevation of the boltused in connection with the modified form of my invention. liig. t) is acentral longitiulinal section of one of the tubular connecting-posts ofthe preferred form. Fig'. l()

is a detail view of the caring-cup or bushing' used in the ju'e'ferredform of my inventioii.

Figs. 11, 12, and 13 aredetail views of a modilicd form of my invention.

Referring to the drawings, A, represents the covers of a hook to theback of which my iniprmv'ements are to lhe applied, and these covershave their rear edges attached in any suitable manner to the parallelclampingplates B and C, respectively, of the adjustable hack-frame ofthe book. llates B and (j are of a length corresponding to the width ofthe covers, and each have their rear end edges providcdwith walls o,/ao'f stiff material, that project at right ang'les to their inner flatsurfaces toward the opposite plate, which are so arranged that the wallsof one plate telcscope within those of the other, substantially asshown. @lampilig-plates B and lare connected, preferably, near each endby tubular posts, each of which comprises a tuhe o, secured to andprojecting Vfrom one plate, into which a tube (l, secured to andprojecting from the other plate, telescopes. '.lhe ends of theseposttubes are secured into the openings made therefor in thel plates,and then a tight-litting plug e is inserted in the mouth of suchattaching' end and the edges ofthe tube swagcd, thus making` a strong,tight, and secure joint. it coil expansion-sy)ring A.' is housed withinthese post-tubes and creates a normal tendency of the clam pingplates toseparate `farther apart.

My improvements comprise gravity-cow trolled locking devices which whenthe book is lying' on one side operate against the tendency oftheclamping-plates to separate and` when laid over on the other side andsubjected to a slight compression automatically uulock and permitautomatic separation l:.|1ereof. lhe locking devices each comprise ahousing' consisting of a tuhc lt, having one end secured to andprojecting Vfrom one of said clamping-jilates, and a sliglltly-sznallertube F, having one end secured to and j n'ojeeting from the otherclamping-plate, so as to aline with and telescopically engage the same..lhe smaller tube ll has a bcaringclui or bushing f/ suitably secured iuthe end thereof entering tube ll, the side of which facing' theojn'iosite end of said tube F is coucaved and is provided with a seriesof equidistant grooves /t y therein, extending', preferably, in atangential direction from the central opening f of the cup. Secured inthe end of the larger tube E which is fastened in clampingplate B is ahead H, closing the mouth of the same, and lieurnaled in the countersunkcentral opening of' this head H is one end of a bolt (f. The peripheryof this bolt is preferably of the same diameter throughout its length,with the exception of its end opposite the end secured in the head,whichis provided with a circumferential flange I, as shown. The end ef thebelt journaled in head I'l is provided with a neek of less diameter,which is created by providing the same with a suitable eircuinferentialgroove, and the portion of the stepped opening in said head Il in whichsaid end of the bolt which is of smallest diameter is journaled forms abearing forsuch neck and thus prevents the longitudinal displacement ofthe bolt. VBetween the portion of the belt (ir journaled in the head Hand the opposite flanged end I of the same it is provided with a spiralgroeve K of slight pitch, and this groeved portion passes through thecentral openingjfl of the bearing-cup ,f/ into the tu be F and betweenthe flanged end I of said bolt, which corresponds in diameter to andfits so that it can just be moved back and forth in the bere of thesmaller tube F. Between the flanged end I of the bolt and thebearing-cup I place a small bearing-ball a', which when the boek isplaced on one side will gravitate into the concave side of the said cupand into the dip of the spiral groove of the bolt and prevent the boltmoving and which when the book is laid on its opposite side will whenthe sides of the beek are compressed so as to release it gravitate toand rest upon the flange of the flanged end I of the bolt and releasesaid belt, so that it can freely move through bearing-cup f/. Owing tothe presence of' the circumferential groove in the end of the bolt andthe correspondingly-shapfal seat or bearing in said head in which saidend is jou rnaled, it is preferred to make said head in two semicircularpieces and to place the end of the bolt between the same` so that itwill seat itself in the central opening` when said pieces are broughttogether and be capable of rotary motion therein when said sectionalhead is inserted and secured in the retained end of the larger tube, butincapable of independent longitudinal movement. The outer extremity ofthe bolt is preferably flush with the outer side or surface of the headand is provided with a diametrieal groove Q therein to permit of itsbeing rotated by a screwdriver. Such rotation of' the boltis desirablewhen the claiiipingplates have been made to compress the paper betweenthem so tight that the expansibility of said paper causes the bolt tohold the locking-balls so tight against the bearing-cup that said ballswill not be reable in the market.

leased automatically when the book is laid on its proper side to make itgravitate out of locking relation with said parts or even when manualcompression is resorted te to effect the same result. Under thesecircumstances when the bolt is rotated in the right direction the ballwill roll in the spiral groeve in the barrel of the belt toward theflanged end thereofl and permit of the gradual separation oftheclamping-plates until loosened sufficient to fall out of the bearing-cupand unlock said clamping-plates. The reverse of this action can also beutilized when desired to nieve said clamping-plates together te agreater extent than could be accomplished by mere manual compressionwhen the matter between them cannot be securely held in place by such amethod.

In Figs. 6 and 8 I shew a modified construetien of my invention, inwhich the principal difference is due to the fact that the belt M isprovided with a series of circular grooves nl, which gives its body acorrugated appearance, and its outer end is preferably non-rotativelysecured in the head H. Vith the exception of the rotation feature thismodification op crates just the same as the preferred form of theinvention shown in the first five figures of the drawings. It istherefore immaterial whether the head I'I is made sectional er not whenused in connection with this modificatien.

IVhile it is desirable te employ beth tubes E and F in the constructionof my invention, it is obvious that the larger or female tube E could bedispensed with, because its principal oiflice is to form a housing forthe bolt (l and provide a smooth exterior for the lock which will nottear the edgesof the paper matter confined between the clamping platesthat may come in contact therewith. The bolt (lr and the smaller tube Fconstitute the essential elements of the lock, and if these two elementsalone were used the bolt would be secured directly to the clampingplatefrom which it projects. It is also obvious that the tubes used in theconstruction of my invention might be any shape in cross-section. Iprefer to make them cylindrical, so as fo be able to use commercialsizes of' pipe, and for this same reason I prefer te employ thelocking-balls or shot, these being easily procur- The belt in the lockshown in the first five figures of the drawings could be made of anyordinary screw of suitable dimensiens. All such changes andmodifications I desire te be understood as considering within the scopeof my invention.

IVhat I claim as new, and desire to secure by Letters Patent, isg

l. In a book, the combination with clamping-plates to which the coversof the same are fastened, of a lock connecting said plates, comprisingtelesceping tubular shells, having continuous unbroken bores, the maletube pro- TOF) IIO

IIS

vided with n restricted end, n` longitiulinnl bolt extending lrein oneet said tubes into the other und interlocking tllerewith zuidindependent ineens interposed between the unile tube und szid boltmlnpted to interlock the suine in indepemlent relntion with ench other.

2. ln :t book, the ceinbinntion with eln|nping-pistes to which thecovers et' the seine :tre fastened, ol1 n lock connecting snid plates,ceniprisi ng teleseeping lnlnllnr shells hztving continuous unbroken l.ores, the mule tube provided with n restricted end, n, longitudinztlcenti-:Ll bolt extending trein one el' sind tubes into the other nndinterlocking` therewith end irnlluiendent means interposed between thenntle tubj und said bolt ndnpted to interlock the szune in indepeinlentrelntien with euch other.

3. lu :t book, the combination with clzuup' ing-plutes to which thecovers ol the snnne nre lnstened, el' n lock conmicting seidplntes,con1- prising telescopingtnbulztr shells hnvingcoutii'nuiusunbroken bores, the mele tube provided with :i restricted end, nlongitlulil'inl corrugnted bolt extending troni one ol' snid tubes intothe other :,nd interlockingtherewith und iinlependent ineens interposedbetweei'l the unile tube und snid bolt ndupted to interlock the szine inirnlependent relntion with cneli other.

4t. ln n, book, the eonlbinntion with clztxnping-plzttes to which thecovers ol the ,me nre Ifztstenelkol. n lock coinieetingsnid plntes,con1prising telesceping tubnlztrshells hnvingcontinuous unbroken bores, thenmle tube provided with n restricted end,n longitudinnl centrztlcorrugated bolt extending lreni one ol seid tubes into the other undinterlocking therewith nud iinleperuilent nlenns interposed between theninle tube :tud seid bolt :tdnpted to interlock the saune, ininlflmieinlent relzttion with euch other.

5. .ln :t book, the eenibiiintion with clnnur ing-plntes to which thecovers ol' the szuneztre l'nstened, et :t lock connectingsnidplntes,con1 prising telescoping tubulnr shells hzwingcontinuousnnbrekeiji bor 1s, the innle tube provided with :t restricted end, nloligitudinnl ro tntnble belt exteinling lreni one et seid tubes intothe other :Lnd ilnlerlocking therewith und independent ineens interposedbetween the lnnle tube und s: id bolt ndnpted to interlock the saine inii'ulepeiulent relntiei'l with euch other.

(L ln n, book, the coiubinntion with elnulping-plntcs to which thecovers ol the sznne nre lnsteneltol :L lock connectiiigseid plnltes,eon1prising telescoi'ling tubulnr shells lntving continuous unbroken bores,the ninle tube provided with n rlestricted end, n longitudinal centrnlrotzttnble bol-t extending troni one ol' snid tubes into the other :indinterlocking therewith :unl independel'it nienils interlmsed between thenntle tube und seid bolt ndnpted to interlock the suine in independentrelation with euch other.

7. ln n book, the conlbinntion with chunping-pistes to which the coversol the saune nre lnstened,o't n, lock connecting'seid plntes,coniprisiug teleseopiug tubulnr shells hnving continuous unbroken bores, thenntle tube provided with n restricted end, n. longitudiinil rotntnblecorrugated bolt extending l'roni one ol'l snid tubes into the other undinterlocking therewith und irnlepemleut inenns interposed between theninle tube und snid bolt :nlztpted to interlock the sinne iniiulepemlent relntion with euch other.

tl. ln n boek, the (-,oinbinntion with clzunping-pln/tes to which thecovers ol' the sznne :ire Yt'ztstenerhol n lock connecting seidplntes,coin prising teleseoping tubulzul shells hnving continuonsunbroken bores, the nntle tube provided with n restricted end,nUlongitudiintl eentrnl rotntztble f xorrugnted Vholt extending trein oneolE seid tubes into the other und interlockingl therewith undindependent ineens interposed between the nntle tube :ind seid boltndnpted to interlock the sinne in independent relntion with `,uch other.

i). ln n book, the mnnbinntion with clznnping-plntes to which the coversol the suine :tre 'lnstened, ol' :t lock connecting seid .plntes undcomprising telescliiping tnbnhul shells, n, bushing in the unretniiunlend ol' the ninle tube the boreol which is smooth, :uid n, longitudiinilbolt extending `lroni the Ieinnle tube through seid bushing endinterlocking therewith in in depernlent relntion with euch other.

1l). ln n book, the eoinbiinttion with cln,inp ing-plutes to which thecovers olI the szun i z ,re Yliest-cned, oll :t lock connecting' s: yidplntes :,nd. comprising telescoping tubular shells, :t bushing in thennretnined end ol the nntle tube the bore ol which is siuooth, und nlongitud inni centrnl belt extending lroni the Ienntle tube throughsztid bushing :uid interlocking therewith in irnlependent relnlionbetween seid. lnlshing :tud its unretztined end.

1 1. ln :t book, thc eonibiinuaion with clninping-plates to which thecovers ol the winne :ire fastened, el :t lock connecting snid plates nudcomprising telescoping tubulin` shells, n, bushing in the unretnined endol the nulle tube, n, longitndinnl bolt extending l'ronl the tenlnletube through seid bushing :ind :t lreel v-n1ovnble bell ndztpted towedge )etween the wills of the innle'tnbe :tud sind bolt to prevent thewithd enfui ot seid bolt, when the book lies on one side :tnd permitsthe withdrnw 'nl thereolI when luid on its opposite side.

12. ,lin n book, the ceinbinzdion with clumping-plnftes to which thecovers ol the suine nre instened, of n lock connefating snid plntes undeoniprisillg telescoping tubulnir shells, :t bushing in the unretninedend olE the nulle tube the bore olI which is sniooth, :unl nlongittnlinnl corrugated bolt extending troni the lenntle tube throughsaid bushing and interlocking therewith in iiuilepeiulent relationbetween said bushing and its unretained end.

13. VIn a book, the combination with clamping-plates to which the coversof the same are fastened, of a lock connecting said plates andcomprising telescoping tubular shells, a bushing in the unrctained endof the male tube the bore of which is smooth, a longitudinal boltextending from the female tube through said bushing and agravity-operated locking device adapted to prevent the withdrawal ofsaid bolt when the book lies on one side and permits the withdrawalthereof when laid on its opposite side without coming` in directoperative contact with said female tube and its unretaincd end.

le. In a book, the combination with clamping-plates to which the coversof the same are fastened, of locks connecting said plates and comprisingtelescoping tubular shells, a bushing in thc unretaincd end of the maletube the bore of which is smooth the side farthest from said end beingconcaved, and a longitudinal bolt extenrfling Vfrom the female tubethrough said bushing and interlocking therewith.

l5. In a book, the combination with clamping-plates to which the coversof thc same are fastened, of locks connecting said plates and comprisingtelescoping tubular shells, a bushing in the unretained end of the maletube the bore of which is smooth the side farthest from said end being cncave .l, and a longitudinal central bolt extending from the female tubethrough said bushing and interlocking therewith in independent relationbetween said bushing and its unretained end.

16. 4lna book, the combination with clamping-plates to which the coversof the same are fastened, of locks connecting said plates and comprisingtelescoping tubular shells, a bushing in the unretained end of the maletube the side farthest from said end being' concaved, a longitudinalbolt extending from the female tube through said bushing and a balladapted tol wedge between said bolt and the sides of the male tube andprevent the withdrawal of said bolt, when the book lies on one side andpermits the withdrawal thereof when laid on its opposite side.

i7. In a book, the combination with clamping-plates to which the coversof the same are fastened, of locks comiectiiig said plates andcomprising telescoping tubular shells, a bushing in the unretained endof the male tube the bore of which is smooth the side farthest from saidend being coneaved, and a longitudinal corrugated bolt extending fromthe female tube through said bushing and interlocking therewith inindependent relation between said luishing and its unretained end.

18. in a book, the combinatioii with ela mping-plates to which thecovers of the same are fastened, of locks connecting said plates,comprising telescoping tubular shells, a bushing in the unretained endof the male tube, a longitudinal spirall vcorrugated bolt extending fromone of said tubes into the other and interlocking therewith andindependent means interposed between said bushing and bolt adapted tointerlock the same in independent relation with each other.

19. ln a book, the combination with clamping-plates to which the coversof the same are fastened, of locks connecting said plates, comprisingtelescoping tubular shells having continuous bores, the male tubeprovided with a restricted end, a longitudinal centralspirally-corrugated bolt extending` from one of said tubes into theother and interlocking therewith and independent means interposedbetween the male tube and said bolt adapted to interlock the same inindependent relation with each other.

20.' Yln a book, the combination with clamping-plates to which thecovers of the same are fastened, of locks connecting said plates,comprising telescoping tubular shells having continuous bores, the maletube provided with a restricted end, a longitudinal rotatable spirallvcorrugatcd bolt extending from one of said tubes into the other andinterlocking therewith and independent means interposed between the maletube and said bolt adapted to interlock the Same in indepemlent relationwith cach other.

21. .ln a book, the combination with clamping-plates to which thc coversof the same are fastened, of locks connecting said plates, comprisingtelescoping tubular shells having continuous bores, the male tubeprovided with a restricted end, a longitudinal central rotatablespirally-corrugated bolt extending from one of said tubes into the otherand interlocking therewith and indcpei'ident means interposed betweenthe male tube and said bolt adapted to interlock the same in independentrelation with each other.

22. .ln a book, the combination with clamping-plates to which the coversof the same are fastened, of locks eonnectingsaid plates, comprisingtelescoping tubular shells having continuous bores, the male tubeprovided with a .restricted end, a longitudinal rotatablespirally-corragated bolt extending from one of said tubes into the otherand interlocking therewith and independent means interposed between themale tube and said bolt adapted to interlock the same in independentrelation with each other.

2?. in a book, the combination with clamping-plates to which the coversof the same are fastened, of locks connecting said plates, comprisingtelescopic tubular shells having continuons bores, the male tubeprovided with a restricted end, a longitudinal central rotatablespirallv-corrugated bolt extending Vfrom one of said tubes into theother and interlocking therewith and independent means interposed ves,

between the male tube and said bolt adapted to interlock the same inindeperulent relation with each other.

ln a book, the combination with clamping-plates Ato which the covers ofthe same are fastened, of locks coni'iecting said plates and comprisingtelescopingtubular shells. a bushing in the unretaiued end of the maletube, and a longitiidinal spirally-corrugated bolt extending Afrom thefemale tube through said bushing and interlocking therewith inindependent relation between its unretained end and the mouth of thetube it enters.

ln a book, the combination u ith clamping-plates to which the covers ofthe saine are fastened, of locks connecting said plates and comprisingtelescoping tubular shells, a bushing in the unretained end of the maletube, a longitudinal spirally-corrugated bolt extending from the lfemaletube through said bushing and a ball adapted to wedge between said boltand the sides of the male tube and prevent the withdrawal of said bolt,when the book lies on one side and permits the withdrawal thereof whenlaid on its opposite side.

2li. ln a book, the combination with clamping-plates te which the coversof the same are fastened, of locks connecting said plates and comprisingtelescoping tubular shells, a bushing in the unretained end of the maletube the bore of which is smooth, a longitudinal spirally-grooved boltextending from the female tube through said bushing and agravityoperatcd locking device adapted to prevent the witlulrawal ofsaid bolt when the book lies on one side and permits the withdrawalthereof when laid on its opposite side.

27. ln a book, the combination with clamping-plates to which the coversof the same are fastened, of locks connecting said plates and comprisingtelescoping tubular shells, a busl ingin the unretaincd end of the maletube the bore of which is smooth the side farthest from said end beingconcaved, and a longitudinal spirally-grooved bolt extending 'from thefemale tube through said bushing and means in the concavitg7 of saidbushing for interlocking said parts.

2li. ln a book, the combination with clamping-plates to which the coversof the same are fastened, a female tube one end of which is secured iuand extends at right angles from one of said plates, a suitable headclosing the retained end of said tube, and abolt one end of which issecured in said head and which extends longitluliually therein, of amale tube having its opposite end secured in alinemeut with said femaletube to the other clampingplate and telescoping with said female tube,and a l'u'ishing secured in the unretained end of said male tube havingits bere smooth and through which said bolt extends and with which itintcrlocks, and gravity-controlled locking devices moval'ile between thesaid bushing and the unretained end of said bolt for interlocking thesaine.

29, ln a book, the couibination with clainping-plates to which thecovers of the same are fastened, a 'female tube one end of which issecured in and extends at right angles from one of said plates, asuitable head closing the retained end of said tube comprising twosemicircular sections, and a bolt one end of which is secured in saidhead and which extends longitiulinally therein, of a male tube havingits opposite end secured in alinement with said female tube to the otherclamping-plate and telescopiug with said female tube, and abushingsecured in theunretaiued end of said male tube through which saidbolt extends and interlocks, and gravit,\'-controlled locking devices.

30. ln a book, the combination with clampil'ig-plates to which thecovers of the same are fastened, a female tube one end of which issecured in and extends at right angles from one of said plates, asuitable head closing the retained end of said tube comprising twosemicircular sections, and a spirally-grooved bolt one end of which issecured in said head and which extends longitudinally therein, of a maletube having its opposite end secured in alinement with said feniale tubeto the other clamping-plate and telescoping with said female tube, and abushingl secured in the unretained end of said male tube through whichsaid bolt extends and iuterlocks, and gravitycoutrolled locking devices.

31. ln a book, the combination with clamping-plates to which the coversof the same are fastened, a `female. tube one end of which is secured inand extends at right angles lfrom one of said plates, a suitable headclosing the retained end of said tube, and a bolt one end of which issecured in said. head and which extends lougitudinally therein, and hasits opposite end circumferentially flanged, of a male tube having itsopposite end secured in alinement with said female tube to theotherclamping-plate and telescoping with said female tube, and a bushingsecured in the retained end of said male tube through which said boltextends and interlocks, and gravity-controlled locking devices adaptedto wedge between said bolt and the sides of said male tube between saidbushing and its circum'fereutially- 'llanged end.

32. ln a. book, the combination with clamping-plates to which the coversof the sameare fastened, a female tube one end of which is secured inand extends at right angles from. one of said plates. a suitable headclosing the retained end of said tube, and a bolt one end of which issecured in said head and which extends longitudinallv therein, of a maletube having its opposite end secured in alinemeut with said Vfemale tubeto the other clampingplate and telcscoping with said female tube,

and a bushing secured in the unretained end of said male tube having itsside farthest from said end concaved and provided with groovesconverging toward the central opening therein through which said boltextends and interlocks, and gravity-controlled locking devices.

33. In a book, the combination with clamping-plates to which the coversof the same are fastened, a Vfemale tube one end of which is secured inand extends at right angles from one of said plates, a suitable headclosing the retained end of said tube comprising two semicircularsections, and a bolt one end of which is rotatably secured in said headand which extends longitudinally therein, of a male tube having itsopposite end secured in alinement with said Vfemale tube to the otherclamping-plate and teleseoping with said female tube` and abushingsecured in the unretained end of said male tube through whichsaid bolt extends and interloeks, and gravitycontrollcd locking devices.

34. In a book, the combination with clamping-plates to which the coversof the same are fastened, of a lock con necting said plates comprising alongitudinal bolt secured to and extending from one of said plates, atube secured to and extending' to the other plate in alinement with saidboltand a bushing in said tube the bore of which is smooth through whichsaid bolt extends into the tube and means movable between the mouth ofsaid tube and the unretained end of said bolt Vfor interlocking thesame.

ln a book, the combination with clamping-plates to which the covers ofthe same are fastened, of a lock connecting said plates comprising alongitudinally-corrugatcd bolt secured to and extending from oneof saidplates, a tube secured to and extending to the other plate in alinementwith said bolt and a bushing in said tube the bore of which is smooththrough which said bolt extends into the tube and means movable betweenthe mouth of said tube and the unretained end of said bolt forinterlocking the same.

36. In a book` thel combination with clamping-plates to which the coversof the same are fastened, of a lock connectingsaid plates comprising alongitudinal bolt secured to and extending Vfrom one of said plates, atu be secured to and extending to the other plate in alinement with saidbolt and a limshing in said tube the bore of which is smooth throughwhich said bolt extends into the tube and independently-movablegravity-actuatml means movable between the mouth of said tube and theunretained end of said bolt for locking the same.

3T. ln a book, the combination with clamping-plates to which the coversof the same are fastened, of a lock connecting said plates comprising alongitudinal bolt secured to and extending from one of said plates, atube secured to and extending from the other plate in alinement withsaid bolt and a bushing in said tube the bore of which is smooth throughwhich said bolt extends into the tube and independently-movablegravity-actuated means movable between the mouth of said tube and theunretained end of said bolt for locking the same.

38. ln a book, the combination with clamping-plates to which the coversof the same are fastened, of a lock connecting said plates comprising arotatable corrugated bolt secured in and extending from one of saidplates, and a tube secured to and extending from the other plate intowhich said bolt enters and means movable within said tube between themouth ofthe said tube and the unretained end of the bolt vfor lockingthe same.

39. ln a book, the combination with clamping-plates to which the coversof the same are fastened, of a lock connecting said plates comprising alongitudinal bolt secured to and extending from one of said plates, atube secured to and extending from the other plate into which said boltenters, and gravity-actuated means between the mouth of said tube andthe unretained end of said bolt capable of movement in planes bothlongitudinally and laterally within said tube and locking said bolt.

40. ln a book, the combination with clamping-plates to which the coversof the same are fastened, of a lock connecting said plates comprising acorrugated bolt secured to and extending from one of said plates, a tubesecured to and extemling from the other plate into which said boltenters, and gravity-actuated means within said tube capable of movementin planesbothlongitudinally and laterally between thc um'etained end ofsaid tube and the unengaged end of the bolt for locking the latter.

41. ln a book, the combination with clamping-plates to which the coversof the same are fastened, of a lock connecting said plates comprising alongitudinal bolt secured to and extending from one of said plates, atube secured to and extending from the other plate having a con tin uousunbroken bore and provided with a restricted end, and independent meansinterposed between said tube and bolt adapted to interlock the same inindependent relation with each other.

ln testimony whereof l have set my hand this 9th day of March, i903.

i-\i\ll)ll-E\\fT D. HULQUISI. lVitnesses:

E. l. LUNnY, FRANK D. li-i'oMAsoN.

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